I am working on the re-design of an old board, but due to many reasons, the original design document is incomplete. So I sometimes have to figure out what an IC is. Here is one I couldn't figure out, and I would appreciate if anyone could give me some hint. The IC seems to be related to LED diode.
Sorry for the late update. I now know what the IC is. It is constant current LED driver IC. Thanks to all who have commented.